Energy storage battery module

Abstract

The utility model provides a kind of energy storage battery module, including box and electric core, box includes four box boards, four box boards are enclosed into the accommodation space for accommodating electric core, it is provided with assembly entrance for electric core to enter box in the length direction of box, positioning member is provided on the inner wall of box, first let go of groove for the positioning member to let go is provided on the outer side wall of electric core, fixed plate is provided on first let go of groove, when electric core is installed in place, fixed plate and positioning member can be connected using fastener;Two first reinforcement beams are provided on the bottom of box, first reinforcement beam is the flange with three bending, the cross section of first reinforcement beam in the width direction of box and the box board of bottom, the box board of side form stepped shape, the sidewall between two first reinforcement beams located high point forms the in-box passage for limiting electric core;Realize the bearing and limiting of electric core, optimize the assembly process, reduce production cost.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, and specifically to an energy storage battery module. Background Technology

[0002] Energy storage batteries are battery devices that convert electrical energy into chemical energy through electrochemical reactions, thereby achieving the purpose of storing and releasing electrical energy. They are widely used in renewable energy storage, grid peak shaving, and backup power.

[0003] In the packaging of energy storage battery packs, cells are first integrated into modules, and then the modules are assembled into the final PACK chassis. Currently, the mainstream assembly methods in the industry are vertical and horizontal insertion, with mechanical fixing and electrical interconnection achieved through connectors. Cell assemblies integrate multiple cells, busbars, sampling harnesses, and thermal management components, resulting in a compact structure and significant weight. During the insertion process, due to accumulated tolerances, positioning is difficult, often requiring repeated manual adjustments or additional complex guide and positioning structures, leading to a cumbersome assembly process. To control the overall system weight and cost, PACK chassis often employ sheet metal or profile welded structures. However, for chassis of large energy storage systems, their overall rigidity and local load-bearing capacity may be insufficient. When hoisting heavy modules, especially during vertical insertion, the side walls or bottom panels of the chassis are prone to elastic or even plastic deformation at stress points. This deformation further alters the geometry of the internal mounting positions, exacerbating the already difficult positioning and alignment, creating a vicious cycle.

[0004] The outer casing of the battery cell and its explosion-proof valve are very fragile. Due to the aforementioned positioning difficulties and the easy deformation of the chassis, the module may collide or scratch with beams, columns, screws or other protrusions inside the chassis on the way into the chassis. Even slight mechanical collisions or stress concentrations may cause damage to the internal structure of the battery cell, puncture of the separator, resulting in safety hazards, or performance degradation, reducing the integrity and stability of the entire battery system, making it difficult to operate safely for a long time under harsh conditions such as vibration and impact. Summary of the Invention

[0005] The purpose of this invention is to provide an energy storage battery module to solve the above-mentioned problems.

[0006] The technical solution adopted in this utility model is as follows: An energy storage battery module includes a housing and battery cells. The housing includes four panels that enclose a space for accommodating the battery cells. An assembly inlet for the battery cells to enter the housing is provided along the length of the housing. A positioning element is provided on the inner wall of the housing. A first clearance groove is provided on the outer wall of the battery cells to allow the positioning element to move. A fixing plate is provided on the first clearance groove. After the battery cells are installed in place, the fixing plate and the positioning element can be connected by fasteners. Two first reinforcing beams are provided at the bottom of the enclosure. The first reinforcing beams are folded edges with three bends. The cross-section of the first reinforcing beams in the width direction of the enclosure forms a step shape with the bottom panel and the side panel. The two first reinforcing beams form an inlet channel between the side walls at the higher points to limit the movement of the battery cells.

[0007] As a further improvement of this utility model, the positioning element is a positioning block, which is located at the assembly entrance.

[0008] As a further improvement of this utility model, positioning blocks are respectively provided on the two opposite inner walls of the housing, and first clearance grooves are respectively provided on the two opposite outer walls of the battery cell.

[0009] As a further improvement of this utility model, a first reinforcing rib is provided between the top box panel and the side box panel.

[0010] As a further improvement of the present invention, the first reinforcing rib extends from one end of the top panel to the other end along the length direction of the box body. The first reinforcing rib is a folded edge with three bends. The cross section of the first reinforcing rib in the width direction of the box body forms a stepped shape with the top panel and the side panel.

[0011] As a further improvement of this utility model, a second clearance groove is provided on the top of the battery cell to make way for the first reinforcing rib.

[0012] As a further improvement of this utility model, a plurality of second reinforcing beams are provided between the two first reinforcing beams, and the stepped surface of the first reinforcing beam at the lowest point and the top surface of the second reinforcing beam form a bearing surface for supporting the battery cell.

[0013] As a further improvement of the present invention, the second reinforcing beam is a folded edge with two bends, and the cross section of the second reinforcing beam in the width direction of the box body forms a rectangle with the bottom box plate.

[0014] As a further improvement of this utility model, a baffle is provided at the end of the housing away from the assembly entrance, and the baffle is used to limit the depth of the battery cell entering the housing.

[0015] As a further improvement of this utility model, a window for wiring is provided on the top box plate, a cover plate is provided on the top box plate for closing the window, and a recess extending into the box body is provided on the bottom box plate, the recess cooperating with the cover plate.

[0016] The beneficial effects of this utility model are as follows: The above structure utilizes positioning components and fixing plates to achieve initial connection between the battery cell and the housing. The housing structure is simple, requiring only a simple bending reinforcement structure to enhance the strength of the housing, enabling it to bear and limit the battery cell, reducing the risk of battery cell collision damage, optimizing the assembly process, and reducing production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure when the battery cell is separated from the casing; Figure 2 This is a structural diagram of the box; Figure 3 This is a schematic diagram of the box facing away from the assembly entrance.

[0018] Wherein: 1-box body, 101-assembly entrance, 102-box panel, 103-recess, 2-battery cell, 201-first clearance groove, 202-fixing plate, 203-second clearance groove, 204-second reinforcing rib, 3-first reinforcing beam, 4-positioning block, 401-positioning base, 402-positioning body, 5-first reinforcing rib, 6-second reinforcing beam, 7-window, 8-baffle, 9-edge sealing. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0020] If the description of this utility model involves directions (e.g., up, down, left, right, front, back, outside, inside, etc.), then the directions involved need to be defined. For example, "To clearly express the position and direction described in this utility model, the operator of the instrument is used as a reference, the end closer to the operator is the proximal end, and the end farther from the operator is the distal end." Or, the paper can be used as a reference. Of course, if the positional relationship between the two is defined by mutual reference in the subsequent description, then this definition is not required.

[0021] An energy storage battery module, such as Figures 1-2 As shown, the device includes a housing 1 and a battery cell 2. The housing 1 includes four panels 102, which are joined end to end to form a space for accommodating the battery cell 2. An assembly inlet 101 for the battery cell 2 to enter the housing 1 is provided along the length of the housing 1. A positioning member is provided on the inner wall of the housing 1, which protrudes from the surface of the inner wall of the housing 1. A first clearance groove 201 for making way for the positioning member is provided on the outer wall of the battery cell 2. The first clearance groove 201 extends along the length of the housing 1. A fixing plate 202 is provided on the first clearance groove 201. When the battery cell 2 is installed in place, the fixing plate 202 and the positioning member can be connected by fasteners, thereby realizing the connection between the battery cell 2 module and the housing 1. Two first reinforcing beams 3 are provided at the bottom of the housing 1. The first reinforcing beam 3 is a folded edge with three bends, the bending angle of which is preferably 90°. The cross section of the first reinforcing beam 3 in the width direction of the housing 1 forms a step shape with the bottom panel 102 and the side panel 102. It is embedded in the corner connection between the bottom panel 102 and the side panel 102, forming the core load-bearing structure of the corner of the housing 1, which enhances the strength of the housing 1. The folded edge forms a hollow tubular structure with the bottom panel 102 and the side panel 102, which reduces the weight of the overall energy storage battery module while ensuring connection strength and guiding effect. The step at the lower point is used to support the battery cell 2. The side walls at the higher points of the two first reinforcing beams 3 form an inlet channel to limit the position of the battery cell 2. The width of the inlet channel is the same as the width of the battery cell 2. Thus, the battery cell 2 slides into the housing 1 along the inlet channel. The battery cell 2 slides on the step at the lower point, while the step at the higher point cooperates to limit the left and right positions of the battery cell 2, so as to avoid the sliding direction of the battery cell 2 from deviating, which would lead to improper assembly or collision.

[0022] In this embodiment, the "length direction of the box body 1" refers to the following: The box body 1 typically includes a top box panel 102, a bottom box panel 102, and two side box panels 102 disposed opposite to each other between the top and bottom box panels 102. In this case, the top box panel 102, the bottom box panel 102, and the two side box panels 102 form the side walls of the box body 1. In addition to the aforementioned side walls, the box body 1 also has two end faces perpendicular to the side walls, and at least one of these end faces is the aforementioned assembly inlet 101. The length direction of the box body 1 extends from one end face to the other, while the surface parallel to the end face represents the width direction of the box body 1. The aforementioned positioning element can be disposed on the top box panel 102, the side box panel 102, or the bottom box panel 102. The position of the first clearance groove 201 is determined according to the position of the positioning element.

[0023] In this embodiment, the positioning element can be a long strip-shaped positioning structure, such as a positioning strip, or a block-shaped positioning structure, such as a positioning block 4. The long strip-shaped positioning structure can fix the battery cell 2 while also providing a certain guiding and limiting function. However, this also naturally increases the complexity of machining such a long strip-shaped positioning structure on the housing 1, and consequently, the production cost. Conversely, using a block-shaped positioning structure reduces machining difficulty and cost, and makes installation and disassembly more convenient.

[0024] In one embodiment of this utility model, the positioning component is a positioning block 4, which is disposed at the assembly entrance 101. Specifically, the positioning block 4 is fixed on the inner sidewall of the assembly entrance 101 and extends from the inner sidewall toward the center of the assembly entrance 101. The positioning block 4 may include a positioning base 401 and a positioning body 402. The positioning base 401 may be a flat base structure. The positioning body 402 is installed in the middle of the flat surface of the positioning base 401 and extends from the positioning base 401 in a direction perpendicular to the flat surface. Mounting holes are opened at both ends of the flat surface of the positioning base 401. The positioning block 4 is connected to the housing 1 by passing fasteners through the mounting holes. Alternatively, the two ends of the flat surface of the positioning base 401 can be directly welded to the housing 1. A positioning component can be formed using a simple sheet metal structure, which is convenient and quick.

[0025] In one embodiment of this utility model, the first clearance groove 201 extends from one end of the battery cell 2 to the other end. The fixing plate 202 is typically disposed on the width section of the first clearance groove 201. When the battery cell 2 is installed in place, the fixing plate 202 abuts against the mounting surface of the positioning member, thereby connecting the fixing plate 202 and the positioning member with fasteners, such as screws, thus achieving the initial fixation of the battery cell 2 and the housing 1. When the positioning member is the aforementioned positioning block 4, the fixing plate 202 can be disposed at the track end of the first clearance groove 201. Thus, when the battery cell 2 is installed in place, the fixing plate 202 abuts against the side of the positioning block 4. The positioning block 4 is also provided with connecting holes for fixing to the fixing plate 202. The fixing plate 202 also provides a certain limit for the battery cell 2.

[0026] In this embodiment, the positioning member and the first clearance groove 201 can be in one set or multiple sets. Multiple sets of the positioning member and the first clearance groove 201 can increase the stability and accuracy of the connection between the housing 1 and the battery cell 2.

[0027] In one embodiment of this utility model, positioning members are respectively provided on two opposite inner sidewalls of the housing 1, and first clearance grooves 201 are respectively provided on two opposite outer sidewalls of the battery cell 2, thereby achieving connection and fixation in two opposite directions and preventing the position of the battery cell 2 from shifting. Based on this, the positioning members are preferably positioning blocks 4, with two positioning blocks 4 respectively provided on the side panel 102, extending relative to each other.

[0028] Based on this, positioning elements can be set on multiple sets of opposing inner sidewalls of the housing 1, and first clearance grooves 201 can be set on multiple sets of opposing outer sidewalls of the battery cell 2. The positioning effect is improved by multi-directional limitation. The aforementioned method of using a set of positioning elements and first clearance grooves 201 to cooperate not only has a good positioning effect, but also plays a certain limiting role. This structure not only simplifies the overall assembly relationship and reduces the structural complexity, but also makes it convenient and quick.

[0029] In practical applications, the top panel 102 of the housing 1 is the main load-bearing and operating surface during hoisting and stacking. During hoisting, the enormous tensile force causes the top panel 102 to tend to bend and deform upwards. When multiple layers are stacked, the upper modules exert downward pressure on the top panel 102. Therefore, the top panel 102 requires higher strength and rigidity. Furthermore, due to gravity, after the battery cell 2 is installed, it is usually in direct contact with the bottom panel 102 or close to it via the mounting base. There is usually a gap between the battery cell 2 and the top panel 102. This gap provides natural space for setting the first reinforcing rib 5 between the top panel 102 and the side panels 102. Therefore, as a preferred embodiment of this utility model, as... Figures 1-3 As shown, a first reinforcing rib 5 is provided between the top box panel 102 and the side box panel 102. Since the first reinforcing rib 5 spans the top box panel 102 and the side box panel 102 with different angles, it can improve the connection strength between the top box panel 102 and the side box panel 102 and enhance the structural stability.

[0030] As an embodiment of this utility model, the first reinforcing rib 5 extends from one end of the top panel 102 to the other end along the length direction of the housing 1. The first reinforcing rib 5 is a folded edge with three bends, and the bending angle is preferably 90°. The cross-section of the first reinforcing rib 5 in the width direction of the housing 1 forms a step shape with the top panel 102 and the side panel 102. The folded edge forms a hollow tubular closed structure with the top panel 102 and the side panel 102, and is embedded in the corner connection between the top panel 102 and the side panel 102 to form the core load-bearing structure of the corner of the housing 1. While ensuring connection strength and guiding effect, the weight of the overall energy storage battery module is reduced.

[0031] Furthermore, a second clearance groove 203 is provided on the top of the battery cell 2 to make way for the first reinforcing rib 5. Thus, during the process of the battery cell 2 sliding into the housing 1, the battery cell 2 and the first reinforcing rib 5 inside the housing 1 always maintain a safe distance, avoiding collision, scratching or spatial interference between the battery cell 2 and the first reinforcing rib 5.

[0032] In one embodiment of this utility model, to ensure the installation stability of the battery cell 2 and the structural load-bearing reliability of the bottom box plate 102, a plurality of second reinforcing beams 6 are provided on the bottom box plate 102. These second reinforcing beams 6 are positioned between two first reinforcing beams 3. The top surface of the second reinforcing beam 6 is at the same height as the step surface of the first reinforcing beam 3 at its lowest point. The step surface of the first reinforcing beam 3 at its lowest point and the top surface of the second reinforcing beam 6 together form a bearing surface for supporting the battery cell 2, on which the battery cell 2 is mounted. The first reinforcing beams 3 and the second reinforcing beams 6 enhance the load-bearing capacity of the bottom box plate 102, improving its bending stiffness and deformation resistance.

[0033] In this embodiment, in the width direction of the box body 1, the cross section of the second reinforcing beam 6 can be I-shaped, U-shaped or hollow tubular structure. Several second reinforcing beams 6 can be linearly distributed along a certain direction, or distributed in a matrix, or arranged in an alternating manner. The specific design needs to be based on the stress conditions. This embodiment does not impose any limitations, as long as it can enhance the load-bearing capacity of the bottom box plate 102.

[0034] In one embodiment of this utility model, the extension direction of the second reinforcing beam 6 is consistent with the extension direction of the first reinforcing beam 3, both extending along the length direction of the housing 1. The second reinforcing beam 6 has a folded edge with two bends. The cross-section of the second reinforcing beam 6 in the width direction of the housing 1 forms a rectangle with the bottom panel 102. The second reinforcing beam 6 can also be a hollow tubular structure, which reduces the overall weight of the energy storage battery module while ensuring connection strength and guiding effect.

[0035] As an embodiment of the present invention, the battery cell 2 includes a core and a frame. The aforementioned first relief groove 201 and fixing plate 202 are both disposed on the frame. A plurality of second reinforcing ribs 204 are disposed on the frame. The second reinforcing ribs 204 can be disposed on the upper and lower sides of the first relief groove 201, thereby enhancing the overall strength of the frame. The second reinforcing ribs 204 can adopt a hollow tubular structure to reduce the overall weight of the frame.

[0036] Furthermore, along the length of the housing 1, a baffle 8 is provided at the end of the housing 1 furthest from the assembly inlet 101. The baffle 8 is used to limit the depth of the battery cell 2 entering the housing 1. Simultaneously, when the battery cell 2 slides into the housing 1 and abuts against the baffle 8, it indicates that the battery cell 2 is properly installed. At this time, the baffle 8 is connected and fixed to the battery cell 2, thus fixing the side of the battery cell 2 furthest from the assembly inlet 101. Specifically, the baffle 8 can be connected to the second reinforcing rib 204 using fasteners.

[0037] As an embodiment of the present invention, a sealing edge 9 is provided at the end of the box plate 102. The sealing edge 9 extends from the box plate 102 toward the center of the assembly entrance 101 and extends to be flush with the side wall of the step at the high point of the first reinforcing beam 3. The side wall of the box plate 102 away from the side adjacent to the first reinforcing rib 5 is flush with the sealing edge 9.

[0038] As an embodiment of this utility model, a window 7 for wiring and cable passage is provided on the top box plate 102, and a cover plate is provided on the top box plate 102 to close the window 7. A recess 103 extending into the box body 1 is provided on the bottom box plate 102. The recess 103 cooperates with the cover plate, so that when stacking the energy storage battery module or the box body 1, the recess 103 can make way for the cover plate and also conveniently achieve positioning.

[0039] After the battery cell 2 is assembled and welded, the battery cell 2 is slowly fed into the housing 1 from the assembly inlet 101 along the length of the housing 1 using a handling fixture. During the housing entry process, the first clearance groove 201 is aligned with the positioning component to ensure that a collision occurs. The battery cell 2 enters the housing entry channel and slides on the bearing surface. The housing entry channel limits the horizontal movement of the battery cell 2 to prevent the battery cell 2 from deviating and causing scratches, collisions, or damage, thus ensuring a smooth and reliable housing entry. When the battery cell 2 abuts the baffle 8, it means that the battery cell 2 has reached the housing entry position. The fixing plate 202 is fixed together with the positioning component using screws, and the baffle 8 is fixed together with the battery cell 2 using screws, thus completing the assembly of the battery cell 2 and the housing 1.

[0040] The energy storage battery module provided by this utility model uses positioning components and fixing plates 202 to achieve the initial connection between the battery cell 2 and the housing 1. The housing 1 has a simple structure, and only a simple bending reinforcement structure and baffle 8 are used to enhance the strength of the housing 1, realize the bearing and limiting of the battery cell 2, adjust the assembly gap generated during the manufacturing process, reduce the risk of collision damage to the battery cell 2, optimize the assembly process, and reduce production costs.

[0041] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0042] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementation methods or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. An energy storage battery module, characterized in that: The device includes a housing (1) and a battery cell (2). The housing (1) includes four panels (102), which together form a space for accommodating the battery cell (2). An assembly inlet (101) for the battery cell (2) to enter the housing (1) is provided along the length of the housing (1). A positioning element is provided on the inner wall of the housing (1), and a first clearance groove (201) for the positioning element is provided on the outer wall of the battery cell (2). A fixing plate (202) is provided on the first clearance groove (201). When the battery cell (2) is installed in place, the fixing plate (202) and the positioning element can be connected by fasteners. Two first reinforcing beams (3) are provided at the bottom of the box (1). The first reinforcing beams (3) are folded edges with three bends. The cross section of the first reinforcing beams (3) in the width direction of the box (1) forms a step shape with the bottom box plate (102) and the side box plate (102). The two first reinforcing beams (3) form an inlet channel for limiting the battery cell (2) between the side walls located at the high point.

2. The energy storage battery module according to claim 1, characterized in that: The positioning component is a positioning block (4), which is located at the assembly entrance (101).

3. The energy storage battery module according to claim 2, characterized in that: Positioning blocks (4) are respectively provided on the two opposite inner walls of the housing (1), and first clearance grooves (201) are respectively provided on the two opposite outer walls of the battery cell (2).

4. The energy storage battery module according to claim 1, characterized in that: A first reinforcing rib (5) is provided between the top box plate (102) and the side box plate (102).

5. The energy storage battery module according to claim 4, characterized in that: The first reinforcing rib (5) extends from one end of the top box plate (102) to the other end along the length direction of the box body (1). The first reinforcing rib (5) is a folded edge with three bends. The cross section of the first reinforcing rib (5) in the width direction of the box body (1) forms a step shape with the top box plate (102) and the side box plate (102).

6. The energy storage battery module according to claim 5, characterized in that: A second clearance groove (203) is provided on the top of the cell (2) for making way for the first reinforcing rib (5).

7. The energy storage battery module according to claim 1, characterized in that: A plurality of second reinforcing beams (6) are provided between the two first reinforcing beams (3), and the step surface of the first reinforcing beam (3) at the lower point and the top surface of the second reinforcing beam (6) form a bearing surface for bearing the battery cell (2).

8. The energy storage battery module according to claim 7, characterized in that: The second reinforcing beam (6) is a folded edge with two bends. The cross section of the second reinforcing beam (6) in the width direction of the box body (1) forms a rectangle with the box plate (102) on the bottom surface.

9. The energy storage battery module according to claim 1, characterized in that: A baffle (8) is provided at one end of the housing (1) away from the assembly entrance (101), the baffle (8) being used to limit the depth to which the battery cell (2) enters the housing (1).

10. The energy storage battery module according to claim 1, characterized in that: A window (7) for wiring is provided on the top panel (102), and a cover plate is provided on the top panel (102) to close the window (7). A recess (103) extending into the box body (1) is provided on the bottom panel (102), and the recess (103) cooperates with the cover plate.

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